AMCC Engine Coolant Thermostat Housing Assembly Compatible with Mercedes-Benz M272 CLK280 CLS300 C230 E350 GLK300 ML300 R300 SLK280 SL300 S300 Replaces:2722000415&2722000115 Replaces part number:2722000415, 2722000115, 2722000015, 272 200 04 15, 272 200 01 15, 272 200 00 15, TM45100D, CTA0020, 4834100D, 483 4100D Good Replacement: The engine's thermostat regulates the temperature of the engine by controlling coolant flow. A bad or failing thermostat: high temperature reading and engine overheating, low temperature reading and underheated engine, temperature changing erratically, coolant leaks around thermostat housing or under the vehicle. How to fine thermostat: You can find your car's thermostat by starting at the upper radiator hose and following it to where it enters the top of the engine Brand new and never used, directly replaces the old one and easy installation. COMPATIBLE WITH：2005-2008 CLK280 Convertible (A209),2005-2008 CLK350 Convertible (A209),2005-2008 CLK280 Roadster (C209),2005-2008 CLK350 Roadster (C209),2009-2010 CLS300 Coupé (C219),2004-2010 CLS350 Coupe (C219),2005-2007 c230 (w203),2007-2007 c280 (w204),2010-2011 C300 Touring (S204),2005-2006 e350 (w211),2009-2010 E300 (W212),2010-2011 E350 Convertible (A207),2009-2011 E350 Roadster Edition (C207),2009-2012 GLK300 4MATIC (X204),2008-2011 GLK350 4MATIC (X204),2010-2011 ml300 4matic (w164) ,2008-2011 ML350 4MATIC (W164) ,2008-2013 r300l (v251),2006-2012 r350l 4matic (v251),2005-2008 slk280 (r171),2008-2010 slk300 (r171),2004-2010 slk350 (r171),2009-2011 sl300 (r230),2006-2011 SL350 (R230),2006-2013 s300l (w221),2008-2011 S350L 4MATIC (W221),2009-2012 s400l (w221) AMCC products are guaranteed for one year after sale，100% inspection and testing prior to shipment